Similar thing happened to me, but only once. When I first got the phone, I turned it on and let the Store install all of my apps. I deleted some apps that I didn't want on the new phone and turned off auto-update in the Store. I rebooted the phone, and the Store started installing the apps I just deleted! I deleted the re-installed apps and doubled checked the auto-update setting (which was still not checked). I've rebooted several times since then, and the apps don't re-install. Not sure why this happened other than a bug somewhere.